Patents by Inventor Jack R. Grenfell

Jack R. Grenfell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Point of sale (POS) terminal security system
    Patent number: 6917299
    Abstract: A security system for electronic circuits (e.g. electronic circuits contained within a secure POS terminal) is provided that is both more tamper resistant, and tamper responsive and less expensive than the prior art epoxy potting. This is achieved by inserting an electrical connector between a first and a second circuit board contained within a case of the POS terminal. The first and the second circuit boards are any type of circuit board known in the art, including both not limited to, rigid circuit boards, flexible circuit boards, printed circuit boards, etc. If the case is opened the connector no longer provides an electrical connection between the first and the second circuit boards, triggering a tamper detection circuit. In some embodiments of the invention, a flexible conductive film is wrapped around the circuit boards and the connector.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: July 12, 2005
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Shuzhen Fu, David C. Hanley, Raymond A. DeBruin, Jack R. Grenfell
  • Point of sale (POS) terminal security system
    Patent number: 6646565
    Abstract: A security system for electronic circuits (e.g. electronic circuits contained within a secure POS terminal) is provided that is both more tamper resistant, and tamper responsive and less expensive than the prior art epoxy potting. This is achieved by inserting an electrical connector between a first and a second circuit board contained within a case of the POS terminal. The first and the second circuit boards are any type of circuit board known in the art, including both not limited to, rigid circuit boards, flexible circuit boards, printed circuit boards, etc. If the case is opened the connector no longer provides an electrical connection between the first and the second circuit boards, triggering a tamper detection circuit. In some embodiments of the invention, a flexible conductive film is wrapped around the circuit boards and the connector.
    Type: Grant
    Filed: June 1, 2000
    Date of Patent: November 11, 2003
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Shuzhen Fu, David C. Hanley, Raymond A. DeBruin, Jack R. Grenfell
  • Point of sale (POS) terminal security system
    Publication number: 20030137416
    Abstract: A security system for electronic circuits (e.g. electronic circuits contained within a secure POS terminal) is provided that is both more tamper resistant, and tamper responsive and less expensive than the prior art epoxy potting. This is achieved by inserting an electrical connector between a first and a second circuit board contained within a case of the POS terminal. The first and the second circuit boards are any type of circuit board known in the art, including both not limited to, rigid circuit boards, flexible circuit boards, printed circuit boards, etc. If the case is opened the connector no longer provides an electrical connection between the first and the second circuit boards, triggering a tamper detection circuit. In some embodiments of the invention, a flexible conductive film is wrapped around the circuit boards and the connector.
    Type: Application
    Filed: February 28, 2003
    Publication date: July 24, 2003
    Inventors: Shuzhen Fu, David C. Hanley, Raymond A. DeBruin, Jack R. Grenfell